Self-opening die head



Aug. 16, 1932. A. F. BREITENsTx-:IN 1,872,059

y SELF OPENING DIE HEAD A Filed sept. 9, 1951 2 sheets-sheet 1 Y@ mw IUE Aug. 16, 1932. A. FL BRElTr-:NSTEIN 1,872,059 v sELF OPENING DIE HEADl Y asneets-sheet 2 Filed Sept. 9, 1931 tripping-stem for adjusting the same Patented Aug. 16, 1932 [UNITED STATES PATENT o1-"FICE ALBERT F. BREITENSTEIN, F NEW HAVEN, CONNECTICUT, ASSIGNOR TO THE GEOMETRIC vTOOLV COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION SELF-crimine DIE HEAD Application inea september 9, 1931./ serial No. 561,895.

One of the main objects of my present invention is to provide an inside-trip die-head in whichrthe inside-trip device is connected to the latching-member in such manner as to release the same with a minimum of lost motion and thus provide a self-openingidiehead structure of the inside-trip type whichV can be relied upon for action. n l

Another object of my invention is to-provide a simple, reliable and convenient selfopening die-head having means for automatically locking its adjustable inside-trip device. I 4

With the above and other objects in view as will appear from the following, my invention consists in a self-opening die-head ofthe accurate and sensitive inside-trip type having certainV features of construction and combinations and arrangements of parts as will be hereinafter described` and particularly recited in the claims. l n n In the accompanying drawings:

Fig. 1 is a viewin side elevation of one form which a self-opening die-head embodying my invention may assume; Y

Fig. 2 is a view thereof in front elevation; Fig. 3 isa view tion;

a larger scale, the parts being shown in the parts in the positions which they Aassume when the die-head is tripped and showing, in addition, a wrench inserted in the adjustable thereof inl rear end' eleva- Fig. 4 is a central longitudinal sectional.l view taken on the line 4 4 of Fig.' 2 but on Fig. 6 is a transverse view taken on the line 6 6 of Figf4; Y

Fig. 7 is a similar view takenon the line 7 7 of Fig. 4;

Fig. 8 is a similar view taken 8 8 of Fig. 4; Y

Fig. 9 vis a broken detail view in longitudinal section taken on the line 9 9 of Fig. 6; Fig. 1() is a similar view taken on the line 10 10 of Fig. 6;

Fig. 11 is a broken detail longitudinal sectional view taken on the line 11 11 of Fig. 2; Fig. 12 is a view partly in side' elevation and partly in longitudinal section o-f` the internal adjustable tripping-stem;

Fig. 13 is a view looking toward the front end thereof;

Fig. 14 is a view lookingtowad the rear end thereof; Y

. Fig. 15 is a perspective view of the latching-plunger detached; and u Fig. 16 is a' perspective view ofthe tripping-slide detached.

The self-opening die-head Yherein chosen for-the illustration of my invention consists,

on the line as'shown, of a body-member 2O having a reardistant radial slots 23 in each of which is mounted va radially-movable chaser 24.

Y The'chasers 24 are vretained in place in the slots 23 in the head-portion v22 of the bodymember byy means of segmental plates 25 and are each formedV at their respective outer ends with Va. slopingy cam-surface 26 each engaged by a. similarly-sloped cam-surface 27, one of which latter is formed adjacent each of thesaid chasers upon the inner forward corner of a cup-shaped Chaser-operating Y sleeve 28. The lsaid sleeve is mounted upon thebody-member with capacity for axial sliding movement and bears'at its forward end upon the periphery of the head-portion 22 of the said lbody-member anda-t its rear end upon the periphery of alatch-carrying ring 29 mounted upon the said body-member with capacity for axi al adjustment-,which adjust- A ment is effected by vanY adjusting-nut 30 of the Chaser-operating sleeve`28.

threaded upon the body-member just forward of the shank 2l thereof.

The latch-carrying ring 29 above referred to is formed with a transverse-notch 31 provided for the accommodation of av latch-member 32 of substantially semicircular form and provided with a central operatingtang 3.3 inwardly-projecting through a clearancefslot 34 formed in the bodyemember 20, as clearly shown in Figs. 4 and 5 of the drawings.:

vrIhe outer forward corner Vof the latch.

member 32 is adapted to engage with a substantially-semicircular eccentric latchmgshoulder 35 formed in the interior of ,theY Chaser-operating sleeve 28 for the purpose of i ward retirement of the said sleeve under the urge of its springs 36-36 in order to permit the chasers 24 to move radially outward into their retired positions, I employ a trippingsleeve 39 mounted upon the chaser-operating i sleeve 28 with capacity for axial movement thereon. The said tripping-sleeve 39 is provided wlth an internal cam-surface 40 adapted when the sleeve 1s moved rearwardly y to exert inward pressure upon a ball 41 which is located in a radial guide-passage 42 in the rear portion of the Chaser-operating member 28 and bears upon the periphery of the latching-member 32. Y

As thus constructed, it will be seen that when the die-head is in use and with the parts Y Fig. 4to the in the positions in which they are shown inl Fig. 4, a relative rearward vdraft upon the tripping-sleeve 39 will, through the inter-A mediary of the ball 41, effect the inward` movement of the latching-mcmber32 and its consequent disengagement from the latchmgshoulder 35 with the effect of permitting the Chaser-operating sleeve 28 to move rearward ly from the position in which it is shown in position in which it is shown in F ig. 5.

The general organization above described may be said to be old in the art and has been set forth and described herein for the pur.

pose of enabling the operation of'my improved inside-trip feature to bev properly understood.

It may be here stated that, broadly speak-` l ing, inside-trips are old in the art and I wish,

therefore, to call particular attention to the novel connection of the inside-trip device with the latch 32, or its equivalent, and the automatic locking feature of the said insidetrip device, as will be presently described.

The body-member 20 is formed with an axially-arranged cylindrical'chamber43, the reary end of which is reduced in diameter as at 44 and extends throughout the length of the shank 21 Vof the said body-member. Mounted in t-he enlarged forward end of the chamber 43 is the cylindrical-contoured head-portion 45 of what I shall, for convenience of description, refer to as a trip ping-slide 46 having also a rearwardly-extending hollow shank 47 sliding in the reduced portion 44 of the axialbore 4'in the shank 2l of the body-memberv 20. v, The tripping-slide 46 above referred to is mounted ,within the body-1nember as above described with capacity for axial movement and is provided with a rearwardlyandoutv wardly-inclined passage 48receiving the sim: ilarly-sloped operating-tang 33 of the latching-member 32 already described.v The tripping-slide 46` isfnorinally held at the limit of its forward'movementby means of a spring 49 encircling its shan-k 47 and bearing at its forward end Yagainst thehead-portion 4 5 and at its rear end against a shoulderv 50 formed at the junction of the chamber 43 proper with its reduced rear-extension` 44, as clearly shown in Figs. 4 and 5.

The tripping-slide 46 has extending therethrough an axial bore 5 1 formed at its forward end with internal threads for engagement .with an; externally-threaded adjustable tripping-stem 52 also provided, in turn, with an axial bore 53, which latter at the forward end of the. stemis enlarged as at 54 and shaped into hexagonal form in cross-section for the reception of they similarly-shapedl ter-A minal 55 of a wrench 56 by means of which thesaid steminay bescrewedinwardly or outwardly inthe tripping-slidelt as mayv be desired. The rear end of the tripping-v stem 52 is formed with two diametri'cal grooves 57-57 which, intersect each other-at a right angle and result in the formation of four latching-.abutments or bosses 57a, asv

clearlvshownl in Fig. l3ofthe drawings.

Mounted within the bore 5l of the tripping-slide 46 just to the rear of the tripping4 stem` 52 is a .springfpressed latching-plunger 5,8 having capacity. forVV axial sliding `move-4 mentand provided with .a forwardly-ex tending stem 59 reciprocatingin the bore 53. of the tripping-stem52 and normally having. its forward end projecting into the hexagonal forward end 54 thereof. At the junction-.

pointof its stem -59 the latchingplunger 58 is provided with a forwardly-'projecting dia-` metrical ribv 6() adapted to enter either one of the two diametrical grooves 57,-57 formed lao in the rear face of the tripping-stem 52, as before described.

To'normally maintain the rib 60 of the latching-plunger 58 in either one ofthe diametrical grooves 57--57 in the tripping-stem 52, I employ a spring 6lY housed within the rear portion of the bore 51 in the said tripping-slide and bearing at its `forward end against the rear face of the latching-plunger 58 and at its rear end against the forward face of a plug 62 threaded into the rear end of the shank 47 of the said tripping-slide.

To provide for coupling the latchingplunger 58 to the tripping-slide 46 lagainst relative rotary movement but with capacity forrelative axial movement I-install inthe said latching-plunger a diametrical keyv 63 projecting at its respective oppositel ends into longitudinal slots 64-64 formed in the wall ofthe shank 47 of the said tripping-slide at diametrically-opposite points therein. The key 63 just referred to is retained in place by means of a set-screw 65 threaded into a boss 66.r rearwardly-projecting Vfrom the latching-plunger 58 and serving asa centering-guide for the-forward end of the spring To prevent the triping-slide 46 from rotating within the body-member 20, I provide the latter with an inwardly-projecting T- shaped key 67 having its cylindrical Stem68 seated in the radial bore 69 in the said bodymember and' having itshead-portion ,entered into va longtudinal keyway 70 formed in the periphery of the head-portion 45 of the said tripping-slide 46. Y The inside-trip feature of myV improved self-opening die-head operates inthe following maner; e 1

Let it be supposed that the parts are in the positions in whichthey are shown in Fig. 4 and that the ldie-head is threaded over the work, or the work threaded in to the die-head,

45 so that the work ultimately abuts against the forward face of the tripping-stem 52 with the e'ect of moving `the same relatively rearwardly, togetherV with the tripping-slide 46, of whiehit forms an adjustable extensionv The rearward movement of the tripping-j stem 52 `and tripping-slide 46 as just above described will cause the forward wall of theV inclined-passage 48 of thelatter to act with a cam-like action upon the forward face ofi the tang 33 with the electof forcibly pulling the latching-member 82' inwardly to` disengage its forward outer corner from the latch- Ving-abutment 35 within the` Chaser-operating sleeve 28 and thus permit the latter to move rearwardly for effecting the retraction of the chasers 24 under the urge of -theretractingsprings 36-36 The parts will nowrhave as positions in which they are shown in particular, to call atten-j` is the 'direct coaction of the tripping-slide with the latching-member 32 for eectingthe The particular die-head Vherewith'chosen for the illustration of my invention is 'also capable of being tripped by means of a'relatively-rearward thrust exerted upon the tripping-sleeve 39, as has been hereinbefore described.

Now let it be supposed that it isdesiredto cut a longer thread upon a piece of work than the tool is set for in the accompanying' drawings before the latch 32 is'retracted to effect the retirement of the chasers and hence the cessation of the threading-operation. This adjustment may be effected by inserting the polygonal terminal 55 of a wrench such as 56 into the hexagonal socket 54 in the forward end of the tripping-stem 52.

The insertion of the wrench in the manner above described and as shown in Fig. 5 will effect the rearward movement of the latchingplunger 58 to a degreesuficient to disengage its coupling-rib 6 0 from whichever of the Grooves 57-57 in which it ma vhave been e Y located, so that the said tripping-stein 52 may now be rotated by means of the wrench 56 as required to effect the desired adjustment of the tripping-point of the die-head.

When the-trippingstem 52 has -beenadjusted to the desired point, the withdrawal of the wrench 56 will permit the spring 61 to move the latching-plunger 58 forwardly again so as to reengage its coupling-13110160 with whichever one of the grooves 574-57 inthe tripping-slide at that time happens'to be'aligned with it, so that thesaid trippingstem is locked in itsnewly-adjust'ed position against accidental displacement.l

It will be understood by those'skilled in theV art'that'my invention may assume' varied physical forms without departing f roinmy inventive concept and" I, therefore, do notl limit' myself to the specific embodiment herein chosen for illustration, but only as indicated in the appended claims I claim: Y l. lIn aself-openingdie-head, the coinbination with the-body, chasers, and chaseri operating member thereof; of a radially and axially movable latching-member .adapted to releasably holdv the said chaser-operating member in its Chaser-closing position; a tripping-member mounted within" the die-head structure in position lto be moved by engagement with the work and engaged directly with a portion of the said latching-member for moving'the same radially inward into its nnlatched position, and adjusting-means for moving the said latching-member axially for the adjustment of the chasers.

6 2. In a self-opening die-head, the combi'- nation with the body, chasers, and chaseroperating member thereof;of a latcliingmember adapted to releasably .hold the said chaser-operating member in its Chaser-closing position and provided with an inwardlyextending tang having an inclined cam-surface; and a tripping-member mounted within. the die-head structure in position to be moved by engagement with the work and provided with a cam-surface engaging directly lwith the cam-surface upon the tang of the said latching-member, the slope of the two said cam-surfaces being such that a relative rearward thrust upon the said trippingmember will eect the .retraction ofthe said latching-ineinber. Y

3. In a self-opening die-head, the combination with the bodyr chasers, and chaseroperating member thereof; of a vlatchingmember adapted to releasably hol-d the said Chaser-operating member in its Chaser-closing position; and a two-part tripping-member located within the die-head structure. and including a tripping-slide engaged directly with al portion of the said latching-member itself for releasing the saine, and a stem ad-. vjustably connected with the said trippingslide and located in position to be engaged with the work.

tion with the body, chasers, and chaseroperating member thereof: of a latchiiig-v member adapted to releasably hold the said surface upon the tang of the said latchingmemben and a stem adjustably connectedy with the said tripping-slide and located in position to be engaged with the work; the slope of the two said cam-surfaces being such that a rela-tive rearward thrust upon the said two-part tripping-member will effect the re-y traction of the said latching-inember.

5. In a self-opening die-head, the combination wtih the body and chasers thereof; of a said chaser-latching member for releasing the chaser-latching member; a, two-part releasing-device for the said chaser-latchmg member. mounted within the die-head structure i and including an inner-member and an outer- 6D member screw-threaded together for relative adjustment and mounted within the die-head structure in position to have the said outermember engaged by the work and the said Minner-member operatively connected to the 4. In a self-opening die-head, the combina-` chaser-operating member iii-its chaser-clos-A cluding a tripping-slide provided with a` cam-surface engaging directly with the camsame', theV v saidA "outer-member having va wrench-engaging portion; and a latchingmember releasably interlocking the innerand outer-members of the said releasing-device and having a portion located adjacent the wrench-engaging portion of the said outer-member in position to be engaged by a Wrench for being moved thereby to eii'ectthe unlatching Vof the said outer-member from the said inner-member as an incident to the engagement of the said wrench with the said outer-member. 4' l A' 6; In a self-opening die-head,the combination with the body and chasers thereof; of a chaser-latching member; a two-part releasing-device mounted within" the die-head structure and operatively connected to the said chaser-latching member, and including a slide and a slide-extension screw-threadec to the said slide and havinga wrench-engaging portion; and a latching-member releasably interlocking the said slide land the Y said slide-extension and having aportion located adjacent the wrench-engaging ,portion of thesaid slide-extension in position Ito-be engaged by a wrench fo-r bein-g moved there by to effect the unlatching of the said slide and slide-extension as an incident to the engagement of the said Wrench with the said slide-extension. Y

7. In a s velf-opening'dic-head, vthe combination withV the body and chasers thereof; of a chaser-latching member; a two-partrreleasing-device mounted within the Vdie-head struc-A ture, operatively connected to the said chaserlatching member, and including'a slide; and a slide-extension screw-threaded'to the said slide and having a wrench-receiving socket;

and a latching-member releasably interlocking the said slide and thesaid slide-extension and having a. portion located' in the Wrenchreceiving socket of the saidslide-extension in4 position to be engaged by a wrench for being moved thereby to eli'ect the unlatching of the;

said slide andslide-extension as an incident to the insertion of a wrench into the socket of the said slide-extension.

8. In a self-opening die-head, the combination withthe bodyand chasers thereof; of a chaser-latching member a two-part r'eleas ing-device mounted within the die-head Y structure and operatively connected', to the said chaser-latching member, and including a' slide and a hollow slide-extension screw-f threaded to the said slide and having ay Wrench-engaging` portion; and'v a latchingmember releasably interlocking the said slide and the said slide-extension and having a stemforwardly projecting throughthe said hollow slide-extension into a position adjacent the wrench-engaging portionv of the l'ato ter so as to be moved by a wrench to effect the unlatching of the said slide and slide-extensionuas an incident to the engagement' ofv the said wrench with the said slide-extension.

9. In a self-opening die-head, the combination with the body and chasers thereof; of a Chaser-latching member; a two-part releasing-device mounted within the die-head structure and operatively connected to the said Chaser-latching member, and including a slide and a hollow slide-extension screwthreaded to the said slide and having av Wrench-receiving socket; andL a latchingmember releasably interlocking the said slide and the said slide-extension and having a stem forwardly proj ecting through the latter into the wrench-receiving socket thereof in position to be engaged and moved by a wrench as an incident to the insertion thereof into the socket of the said slide-extension. Y

l0. In a self-opening die-head, the combination with the body and chasers thereof; of a Chaser-latching member; a two-part releasing-device mounted within the die-head structure and operatively connected to the said Chaser-latching member, and including a hollow slide and a hollow slide-extension screw-threaded to the said slide and having a wrench-engaging portion; and a latchingmember axially movable within the said hollow slide and having a stem forwardly projecting through the said hollow slide-extension into a position adjacent the wrench-engaging portion of the latter so as to be moved by a wrench to effect the unlatching of the said slide and slide-extension as an incident lto the engagement of the said wrench with the said slide-extension.

11. In a self-opening die-head, the combination with the body and chasers thereof; of a Chaser-latching member; a two-part releasing-device mounted Within the die-head structure and operatively connected to the said Chaser-latching member, and including a. hollow slide and a hollow slide-extension screw-threaded to the said slide and having a wrench-engaging portion; a latching member axially movable within the said hollow slide and having a stem forwardly projecting through the said hollow slide-extension into a position adjacent the wrench-engaging portion of the latter so as to be moved by a wrench to effect the unlatching of the said slide and slide-extension as an incident to the engagement of the said Wrench with the said slide-extension; and a spring housed within the said hollow slide in position to exert a constant efort to force the said latching-member forward into its latching position.

12. In a self-opening die-head, the combination with the body and chasers thereo-f; of a. Chaser-latching member; a two-part releasing-device mounted within the die-head structure and operatively connected to thel screw-threadedto the said slide and having am lwrench-receiving socket; and a latchingmeinber.. axially movable within the said hol-` lowfs'lide and having a stem forwardly projecting through the said hollow slide-extensi'on into the vwrench-receiving socketrthereof. imposition to be engaged and moved by apw'rench yas anfincident to the insertion thereof into the socket ofthe said slide-extension; Y

18,. In a self-opening die-head, the combination with the body and chasers thereof; ofa Chaser-latching member; a two-part releasing-device mounted within the die-head structure and operatively connected to the -said Chaser-latching member, and including a slideand a hollow slide-extension screwthreaded to the said slide'` and having a wrench-engaging portion at its forward end and a latching-abutment at its rear end; and a latching-member interlocked with the said slide against relative rotary movement but free for reciprocating movement and having a latching-abutment engageable with the latching-abutment of the said slide-extension for releasably interlocking the same with the said slide and also having a stem forwardly-projecting through the said hollow slide-extension into a position adjacent the wrench-engaging portion of the latter so as to be moved by a wrench to eEect the unlatching of the said slide andslide-extension as an incident to the engagement of the said wrench with the said slide-extension.

14. In a self-opening die-head, the combination with the body and chasers thereof; of a Chaser-latching member; a two-part releasing-device mounted within the die-head structure and operatively connected to the said Chaser-latching member, and including a hollow slide and a hollow slide-extension screw-threaded to the said slide and having a wrench-engaging portion and a latchingabutment at its rear end; and a latchingmember axially movable within the said hollow slide with which it is interlooked against relative rotary movement and having a latching-abutment engageable with the latching-abutment of the said slide-extension for releasably interlocking the same with the said slide and also having a stem forwardly projecting through the said hollow slide-extension into a position adjacent the wrenchengaging portion of the latter so as to be moved by a wrench to eect the unlatching of the said slide and slide-extension as an incident to the engagement of the said wrench with the said slide-extension.

15. In a self-opening die-head, the combination with the body, chasers and chaseroperating member thereof, o-f a latch-carrying ring mounted upon the said body with capacity for axial adjustment thereupon, a radially and axially movable latching-member carried by the said ring, with respect to which it has radial movement and adaptedk to releasably hold the Chaser-operating member in its Chaser-closing position, atripping-member mounted Within the die-head structure in position to he moved by engagement with the Work and itself engaged directly With a portion of the latohing-member for moving the saine radially inward intol its unlatehed position, and adjusting-means 10 for moving the said latch-carrying ring axially for adjusting the Chaser-operating member.

In testimony whereof, I have signed this specification. Y Y

ALBERTVF. BREITENSTEIN. 

